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Jesse James’ ex: Everyone knew he cheated — except for his wife

His ex-wife knew. His employees knew. Every one knew Jesse James was a bad-boy womanizer with a string of ink- stained strumpets on the side — except for loving, devoted wife Sandra Bullock.

In explosive revela tions yesterday, friends and other insiders re vealed James had trysts with as many as 11 women during his five- year marriage to one of Hollywood’s sweethearts before stripper Michelle “Bombshell” McGee blew his cover last week with claims of an 11-month af fair.

“He’s a chronic cheater,” James’ second wife, jailed porn star Janine Lindemulder, told In Touch magazine.

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“I feel sorry for Sandra because she was so in love with Jesse that she was blind and gullible.”

Lindemulder — whose daughter, Sunny, is being raised by Bullock while she’s in prison for tax evasion — said she likes Sandra and tried to warn the actress about his extramarital proclivities.

But when Bullock accepted her 2010 Golden Globe award and gushed that James had “my back,” Lindemulder said, “All I could think was, ‘No. You have this man who does it behind your back.’ ”

She claims James cheated on her just weeks into their own two-year marriage. After their 2004 divorce, the pair had phone sex while James was dating Bullock.

“It’s hard to say no to the guy,” Lindemulder told Life & Style magazine.

Meanwhile, a second tattooed stripper, Melissa Smith, stepped forward claiming she had a two-year fling with the “Vanilla Gorilla” that started in 2006, a year into James’ marriage to Bullock.

“We wound up having sex on his couch, and he didn’t use a condom,” Smith, 35, told Star magazine.

James brazenly bedded 11 women — many of them on the couch in his private office at his West Coast Chopper motorcycle shop, sources told the National Enquirer.

“He’s even had sex with other women right under Sandra’s nose,” one insider told the mag.

“One girl said Jesse would take her into his office and lock the door, while Sandra was in the garage,” a source said.

Another woman, a 32-year-old single mom, was so smitten with bad boy James that she’d “drop everything” and run over for nooners with him at the garage, a source claimed.

The National Enquirer also revealed that James twice paid off female garage employees who threatened to go public.

In 2000, former James employee Deann McClung sued, claiming he’d locked her in his office, forced her to perform oral sex, and later fired her, according to the mag.

“Jesse James is a brutal, terrible person with no heart, no conscience,” McClung said. “He uses people to get what he wants and he throws them away.”

jeane.macintosh@nypost.com